Add a coat of aquaseal for improve resistence of tube

I saw a old thread on Roman Dial blog(february 20 ,2010)about possibility to add a coat of urethane(aquaseal) to the bottom and the sides of packraft for improve durability for creeking.I’m interessed about this idea mainly for the lower part of tube.
Someone try that?
if yes,what is your review about that?
Possibility to repair a hole with aquaseal a fabric that already have a coat of aquaseal on it?
Coat of aquaseal certainly improve scratch resistance,but what about hole and tear?